Low Battery Capacity?

Hello everyone, I'm a new Mac User, and I'm new to laptops in general. I have noticed that after owning my mac for approx. 6 weeks, the battery life has not been as great as some people seem to be getting on this forum. I calibrated the battery as soon as I took the computer out of its box, but it seems that even with the screen brightness on its lowest, airport and bluetooth off, I can squeeze maybe three hours out of it. I downloaded the app Coconut battery, and it says that my Maximum battery capacity is 4883 mAH and its original was 5200. Does this seem low to anyone? Any help is appreciated. Thanks in advance.

I've been monitoring my battery capacity with Coconut Battery for about 2 weeks now and have some interesting results:
Date Max Capacity
2006-06-30 97% (5084 mAh)
2006-07-01 90% (4729 mAh)
2006-07-02 95% (4984 mAh)
2006-07-03 96% (5006 mAh)
2006-07-04 96% (5006 mAh)
2006-07-07 95% (4977 mAh)
2006-07-14 96% (5038 mAh)
2006-07-16 88% (4585 mAh)
2006-07-17 97% (5063 mAh)
2006-07-20 97% (5059 mAh)
It also indicates that I have 53 cycle loads. But I have only calibrated the battery twice.
I was under the impression that battery capacity steadily went down with use but the results seems to indicate that is can go up and down. One thing I did notice was that my capacity went down fairly dramatically early on (about one week in to owning the MacBook) from 5200 mAh down to about 5050 mAh.
I'm wondering if CoconutBattery is giving correct readings or if it's just my limited knowledge of battery life. If anyone spots anything unusual going on with my battery I'd interested to know.
iMac G4 15" flat screen : MacBook 1.83 (Tiger)   Mac OS X (10.3.9)  

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    That night I plugged the nano into the wall with my adapter (we've had this one a while so it can't be one of the new ones that was recalled and we've charged other iPods with it) and let it sit overnight. The next morning I unplugged the nano clicked around on it a few times and again the battery display went down a sliver. I thought maybe it was a display issue, figured I'd take it to work and give it a try. After about 1-1/2 hours of listening (occasionally pausing it), the battery display was down to about 1/2.
    I charged it again on the computer. This time it took between 1-2 hours on the computer for it to show fully charged. Brought it to work again today and the same darn thing is happening with the battery display. I have not tried running it overnight or for several hours to see if it drains completely.
    I have it set to Energy Saver.
    Are lots having these battery issues? Not sure if I should take it back to Best Buy and exchange it for another one just yet.
    Brian, if you read this, did your restoring end up really helping? Seems like you shouldn't have to do that and re-install software that was already on the nano when you purchased it, but if that completely fixed your battery problem, I'll give it a try.
    Any suggestions would be appreciated. Thanks!

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